Question

The following diagram shows an incident ray AO and the normal ON on a plane mirror. Find the angle of incidence and angle of reflection.

Answer 1

ON is a perpendicular on a plane mirror

Angle of incidence$\angle iwhichis\angle AON$

Angle between incident ray and normal = 90° - 30°

Angle of incidence = 60°

$\angle i=\angle r$

Thus, angle of reflection = 60°